#include <stdio.h>
#include <ctype.h>

void duze_litery(FILE *s, FILE *d) {
	char sch, dch;

	while((sch = getc(s)) != EOF) {
		if(isalpha(sch)) {
			dch = toupper(sch);
		}
		else
			dch = sch;
		putc(dch, d);
	}
}
